Gar-roof



UNITED STATES PATENT OFFICE.

JOHN C. WADS, OF LOISVILLEKENTUGKY.

CAR-ROOF.

SPECIFICATION forming part ofV Letterslatent No. 224,496, dated February10, 1880.

Application filed December 6, 1879.

To all lwhom it ma/y concern Be it known that I, JOHN C. WANDS, ofLouisville, in the county ot' Jefferson and State of Kentucky, haveinventedB a new and valuable Improvement in Wooden Gar-Roofs;

and I do hereby declare that the following isy a full, clear, and exactdescription of the cdbstruction and operation of the same, reference'This invention has relation to improvements in wooden car-roofs.

The nature of the invention consists in the construction and novelarrangement of parts', as hereinafter shown and described.

In the annexed drawings, the letters A A designate two adjoining boardsof a car-roof, laid side by side upon a roofframe and ex-V tending fromthe ridge-pole somewhat beyond the sides ofthe ear. Near the adjacentedges ofthe boards 'A A are formed 'channels a a', of suitable depth, inwhich are received tongues or ribs b, upon the under side of a hatten,cap, or f strip,77 as these devices are ndiieren tly called; or, asshown in Fig. 1, the channels or grooves may be made in the cap B, andthe tongues on the edges of the boards. VIn either case the grooves orchannels are wider than the tongues, in order to allow the boards toexpand or contractfreely. These battens have inclined sides, and theirlower portions or eaves, reach out beyond the `inner edge of the saidgrooves when in the boards, and rest upon a .plane bearing,\y, betweenthe grooves a n, so

that the former are completely covered in and dust, cinders, and thelike are prevented from getting into and clogging up the same.

'lhe boards are laid upon the frame side by side, and the caps placedthereon, the tongues and grooves being engaged with each other.

Screws S are then passed down through the center of the cap between theroof-boards into' the purlins or rafters of the root and forcibly 5odriven home, one-halt` of said screws being in the edge of one of saidboards and the other halfI in that of the other. Thus, it will beobserved, the boa-rds have a slight edgewise movement that neutralizesthe cross-strain of the car and relieves them of all stress, While atthe same time they are incapable of endwise movement, for the reasonthat one-halfof the thicknessA of the screws is in the edge ot one boardand the remainder in that of the 6o other. 'The caps, also, are free or'the stress ot' the cross-strain.

As shown in Fig. 2 the caps are prevented from warping by means ofrivets i fr, driven through them from edge to edge', and the like 65Vinjury to the boards A A is guarded against by means of wire nails t',driven alternately from opposite edges and extending two-thirds of theway through from edge to edge. This` application of the nailspossesses'the advan- 7o tage of oering no obstacle -to the expansion orcontraction of the Yrootboards, while it is equally as ei'ect-ive astransverse battens, which interrupt the downward tlow of water, orthrough-nails. 7 5

Outside of the caps the roof-boards may have other channels, n.

What I claim as new,`and desire to secure by Letters Patent, is-

The strip, cap, or hatten B, having the 8ol tongues b, and the eavesportions w, extending laterally beyond said ribs,in combination with theroof-boards A A', having parallel channels a n. the former receiving thesaid tongues and of greater width than the same, and the plane 8 5bearin g y, between said channels, and the fastening-screws passing downthrough the caps between the boards into the roof-frame and seated halfin one board and half in the other,

substantially as specified., Y 9o In testimony that I claim the above Ihave hereunto subscribed my name in the presence of two Witnesses. 1W*

. JoEN CLARK wANDs Witnesses:

Tnos. GUDIHY, vBierman P. TRAVERS.

